Abstract Corrosion of three bulk enamels with different silica contents in sulfuric acid was studied. Catastrophic corrosion happened for enamel with 54.6 wt% silica. Its weight loss reached 36.90 mg/cm 2 after seven-day corrosion. A porous leached layer with tremendous cracks formed at surface during corrosion, which favored acid invading and further corrosion. On the contrary, the durability of enamels with silica content over 60 wt% was guaranteed by their highly connected silicate network and a developed dense gel layer that clogged corrosion pits. Their weight losses were less than 0.2 mg/cm 2 after seven-day corrosion.

中文翻译：

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模拟不同二氧化硅含量搪瓷的硫酸露点腐蚀

摘要 研究了三种不同二氧化硅含量的搪瓷在硫酸中的腐蚀情况。含有 54.6 wt% 二氧化硅的搪瓷发生了灾难性腐蚀。经过7天的腐蚀，其重量损失达到36.90 mg/cm 2 。腐蚀过程中在表面形成具有巨大裂纹的多孔浸出层，有利于酸的侵入和进一步腐蚀。相反，二氧化硅含量超过 60 wt% 的搪瓷的耐用性由其高度连接的硅酸盐网络和堵塞腐蚀坑的发达致密凝胶层保证。在腐蚀 7 天后，它们的重量损失小于 0.2 mg/cm 2。